#
# Author:: Adam Jacob (<adam@chef.io>)
# Author:: Tim Hinderliter (<tim@chef.io>)
# Author:: Christopher Walters (<cw@chef.io>)
# Copyright:: Copyright 2008-2017, Chef Software Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

require "spec_helper"
require "spec/support/shared/context/client"
require "spec/support/shared/examples/client"

require "chef/run_context"
require "chef/server_api"
require "rbconfig"

class FooError < RuntimeError
end

describe Chef::Client do
  include_context "client"

  context "when minimal ohai is configured" do
    before do
      Chef::Config[:minimal_ohai] = true
    end

    it "runs ohai with only the minimum required plugins" do
      expected_filter = %w{fqdn machinename hostname platform platform_version ohai_time os os_version}
      expect(ohai_system).to receive(:all_plugins).with(expected_filter)
      client.run_ohai
    end
  end

  context "when Ohai tells us to fail" do
    it "fails" do
      ohai_system = Ohai::System.new
      module Ohai::Exceptions
        class CriticalPluginFailure < Error; end
      end
      expect(ohai_system).to receive(:all_plugins) { raise Ohai::Exceptions::CriticalPluginFailure }
      expect { client.run_ohai }.to raise_error(SystemExit)
    end
  end

  describe "authentication protocol selection" do
    context "when FIPS is disabled" do
      before do
        Chef::Config[:fips] = false
      end

      it "defaults to 1.1" do
        expect(Chef::Config[:authentication_protocol_version]).to eq("1.1")
      end
    end
    context "when FIPS is enabled" do
      before do
        Chef::Config[:fips] = true
      end

      it "defaults to 1.3" do
        expect(Chef::Config[:authentication_protocol_version]).to eq("1.3")
      end

      after do
        Chef::Config[:fips] = false
      end
    end
  end

  describe "configuring output formatters" do
    context "when no formatter has been configured" do
      it "configures the :doc formatter" do
        expect(client.formatters_for_run).to eq([[:doc]])
      end

      context "and force_logger is set" do
        before do
          Chef::Config[:force_logger] = true
        end

        it "configures the :null formatter" do
          expect(client.formatters_for_run).to eq([[:null]])
        end
      end

      context "and force_formatter is set" do
        before do
          Chef::Config[:force_formatter] = true
        end

        it "configures the :doc formatter" do
          expect(client.formatters_for_run).to eq([[:doc]])
        end
      end

      context "both are set" do
        before do
          Chef::Config[:force_formatter] = true
          Chef::Config[:force_logger] = true
        end

        it "configures the :doc formatter" do
          expect(client.formatters_for_run).to eq([[:doc]])
        end
      end
    end

    context "when a formatter is configured" do
      context "with no output path" do
        before do
          Chef::Config.add_formatter(:min)
        end

        it "does not configure a default formatter" do
          expect(client.formatters_for_run).to eq([[:min, nil]])
        end

        it "configures the formatter for STDOUT/STDERR" do
          configured_formatters = client.configure_formatters
          min_formatter = configured_formatters[0]
          expect(min_formatter.output.out).to eq(STDOUT)
          expect(min_formatter.output.err).to eq(STDERR)
        end
      end

      context "with an output path" do
        before do
          @tmpout = Tempfile.open("rspec-for-client-formatter-selection-#{Process.pid}")
          Chef::Config.add_formatter(:min, @tmpout.path)
        end

        after do
          @tmpout.close unless @tmpout.closed?
          @tmpout.unlink
        end

        it "configures the formatter for the file path" do
          configured_formatters = client.configure_formatters
          min_formatter = configured_formatters[0]
          expect(min_formatter.output.out.path).to eq(@tmpout.path)
          expect(min_formatter.output.err.path).to eq(@tmpout.path)
        end
      end

    end
  end

  describe "a full client run" do
    shared_examples_for "a successful client run" do
      include_context "a client run"
      include_context "converge completed"
      include_context "audit phase completed"

      include_examples "a completed run"
    end

    describe "when running chef-client without fork" do
      include_examples "a successful client run"
    end

    describe "when the client key already exists" do
      include_examples "a successful client run" do
        let(:api_client_exists?) { true }
      end
    end

    context "when an override run list is given" do
      it "permits spaces in overriding run list" do
        Chef::Client.new(nil, :override_runlist => "role[a], role[b]")
      end

      describe "calling run" do
        include_examples "a successful client run" do
          let(:client_opts) { { :override_runlist => "recipe[override_recipe]" } }

          def stub_for_sync_cookbooks
            # --Client#setup_run_context
            # ---Client#sync_cookbooks -- downloads the list of cookbooks to sync
            #
            expect_any_instance_of(Chef::CookbookSynchronizer).to receive(:sync_cookbooks)
            expect(Chef::ServerAPI).to receive(:new).with(Chef::Config[:chef_server_url], version_class: Chef::CookbookManifestVersions).and_return(http_cookbook_sync)
            expect(http_cookbook_sync).to receive(:post).
              with("environments/_default/cookbook_versions", { :run_list => ["override_recipe"] }).
              and_return({})
          end

          def stub_for_node_save
            # Expect NO node save
            expect(node).not_to receive(:save)
          end

          before do
            # Client will try to compile and run override_recipe
            expect_any_instance_of(Chef::RunContext::CookbookCompiler).to receive(:compile)
          end
        end
      end
    end

    describe "when a permanent run list is passed as an option" do
      it "sets the new run list on the node" do
        client.run
        expect(node.run_list).to eq(Chef::RunList.new(new_runlist))
      end

      include_examples "a successful client run" do
        let(:new_runlist) { "recipe[new_run_list_recipe]" }
        let(:client_opts) { { :runlist => new_runlist } }

        def stub_for_sync_cookbooks
          # --Client#setup_run_context
          # ---Client#sync_cookbooks -- downloads the list of cookbooks to sync
          #
          expect_any_instance_of(Chef::CookbookSynchronizer).to receive(:sync_cookbooks)
          expect(Chef::ServerAPI).to receive(:new).with(Chef::Config[:chef_server_url], version_class: Chef::CookbookManifestVersions).and_return(http_cookbook_sync)
          expect(http_cookbook_sync).to receive(:post).
            with("environments/_default/cookbook_versions", { :run_list => ["new_run_list_recipe"] }).
            and_return({})
        end

        before do
          # Client will try to compile and run the new_run_list_recipe, but we
          # do not create a fixture for this.
          expect_any_instance_of(Chef::RunContext::CookbookCompiler).to receive(:compile)
        end
      end
    end

    describe "when converge completes successfully" do
      include_context "a client run"
      include_context "converge completed"
      context "when audit mode is enabled" do
        describe "when audit phase errors" do
          include_context "audit phase failed with error"
          include_examples "a completed run with audit failure" do
            let(:run_errors) { [audit_error] }
          end
        end

        describe "when audit phase completed" do
          include_context "audit phase completed"
          include_examples "a completed run"
        end

        describe "when audit phase completed with failed controls" do
          include_context "audit phase completed with failed controls"
          include_examples "a completed run with audit failure" do
            let(:run_errors) { [audit_error] }
          end
        end
      end
    end

    describe "when converge errors" do
      include_context "a client run"
      include_context "converge failed"

      describe "when audit phase errors" do
        include_context "audit phase failed with error"
        include_examples "a failed run" do
          let(:run_errors) { [converge_error, audit_error] }
        end
      end

      describe "when audit phase completed" do
        include_context "audit phase completed"
        include_examples "a failed run" do
          let(:run_errors) { [converge_error] }
        end
      end

      describe "when audit phase completed with failed controls" do
        include_context "audit phase completed with failed controls"
        include_examples "a failed run" do
          let(:run_errors) { [converge_error, audit_error] }
        end
      end
    end
  end

  describe "when handling run failures" do
    it "should remove the run_lock on failure of #load_node" do
      @run_lock = double("Chef::RunLock", :acquire => true)
      allow(Chef::RunLock).to receive(:new).and_return(@run_lock)

      @events = double("Chef::EventDispatch::Dispatcher").as_null_object
      allow(Chef::EventDispatch::Dispatcher).to receive(:new).and_return(@events)
      # @events is created on Chef::Client.new, so we need to recreate it after mocking
      client = Chef::Client.new
      allow(client).to receive(:load_node).and_raise(Exception)
      expect(@run_lock).to receive(:release)
      expect { client.run }.to raise_error(Exception)
    end
  end

  describe "when notifying other objects of the status of the chef run" do
    before do
      Chef::Client.clear_notifications
      allow(Chef::Node).to receive(:find_or_create).and_return(node)
      allow(node).to receive(:save)
      client.load_node
      client.build_node
    end

    it "notifies observers that the run has started" do
      notified = false
      Chef::Client.when_run_starts do |run_status|
        expect(run_status.node).to eq(node)
        notified = true
      end

      client.run_started
      expect(notified).to be_truthy
    end

    it "notifies observers that the run has completed successfully" do
      notified = false
      Chef::Client.when_run_completes_successfully do |run_status|
        expect(run_status.node).to eq(node)
        notified = true
      end

      client.run_completed_successfully
      expect(notified).to be_truthy
    end

    it "notifies observers that the run failed" do
      notified = false
      Chef::Client.when_run_fails do |run_status|
        expect(run_status.node).to eq(node)
        notified = true
      end

      client.run_failed
      expect(notified).to be_truthy
    end
  end

  describe "build_node" do
    it "should expand the roles and recipes for the node" do
      node.run_list << "role[role_containing_cookbook1]"
      role_containing_cookbook1 = Chef::Role.new
      role_containing_cookbook1.name("role_containing_cookbook1")
      role_containing_cookbook1.run_list << "cookbook1"

      # build_node will call Node#expand! with server, which will
      # eventually hit the server to expand the included role.
      mock_chef_rest = double("Chef::ServerAPI")
      expect(mock_chef_rest).to receive(:get).with("roles/role_containing_cookbook1").and_return(role_containing_cookbook1.to_hash)
      expect(Chef::ServerAPI).to receive(:new).and_return(mock_chef_rest)

      # check pre-conditions.
      expect(node[:roles]).to be_nil
      expect(node[:recipes]).to be_nil
      expect(node[:expanded_run_list]).to be_nil

      allow(client.policy_builder).to receive(:node).and_return(node)
      client.policy_builder.select_implementation(node)
      allow(client.policy_builder.implementation).to receive(:node).and_return(node)

      # chefspec and possibly others use the return value of this method
      expect(client.build_node).to eq(node)

      # check post-conditions.
      expect(node[:roles]).not_to be_nil
      expect(node[:roles].length).to eq(1)
      expect(node[:roles]).to include("role_containing_cookbook1")
      expect(node[:recipes]).not_to be_nil
      expect(node[:recipes].length).to eq(2)
      expect(node[:recipes]).to include("cookbook1")
      expect(node[:recipes]).to include("cookbook1::default")
      expect(node[:expanded_run_list]).not_to be_nil
      expect(node[:expanded_run_list].length).to eq(1)
      expect(node[:expanded_run_list]).to include("cookbook1::default")
    end

    it "should set the environment from the specified configuration value" do
      expect(node.chef_environment).to eq("_default")
      Chef::Config[:environment] = "A"

      test_env = { "name" => "A" }

      mock_chef_rest = double("Chef::ServerAPI")
      expect(mock_chef_rest).to receive(:get).with("environments/A").and_return(test_env)
      expect(Chef::ServerAPI).to receive(:new).and_return(mock_chef_rest)
      allow(client.policy_builder).to receive(:node).and_return(node)
      client.policy_builder.select_implementation(node)
      allow(client.policy_builder.implementation).to receive(:node).and_return(node)
      expect(client.build_node).to eq(node)

      expect(node.chef_environment).to eq("A")
    end
  end

  describe "load_required_recipe" do
    let(:rest)        { double("Chef::ServerAPI (required recipe)") }
    let(:run_context) { double("Chef::RunContext") }
    let(:recipe)      { double("Chef::Recipe (required recipe)") }
    let(:required_recipe) do
      <<EOM
fake_recipe_variable = "for reals"
EOM
    end

    context "when required_recipe is configured" do

      before(:each) do
        expect(rest).to receive(:get).with("required_recipe").and_return(required_recipe)
        expect(Chef::Recipe).to receive(:new).with(nil, nil, run_context).and_return(recipe)
        expect(recipe).to receive(:from_file)
      end

      it "fetches the recipe and adds it to the run context" do
        client.load_required_recipe(rest, run_context)
      end

      context "when the required_recipe has bad contents" do
        let(:required_recipe) do
          <<EOM
this is not a recipe
EOM
        end
        it "should not raise an error" do
          expect { client.load_required_recipe(rest, run_context) }.not_to raise_error()
        end
      end
    end

    context "when required_recipe returns 404" do
      let(:http_response) { Net::HTTPNotFound.new("1.1", "404", "Not Found") }
      let(:http_exception) { Net::HTTPServerException.new('404 "Not Found"', http_response) }

      before(:each) do
        expect(rest).to receive(:get).with("required_recipe").and_raise(http_exception)
      end

      it "should log and continue on" do
        expect(logger).to receive(:trace)
        client.load_required_recipe(rest, run_context)
      end
    end
  end

  describe "windows_admin_check" do
    context "platform is not windows" do
      before do
        allow(ChefConfig).to receive(:windows?).and_return(false)
      end

      it "shouldn't be called" do
        expect(client).not_to receive(:has_admin_privileges?)
        client.do_windows_admin_check
      end
    end

    context "platform is windows" do
      before do
        allow(ChefConfig).to receive(:windows?).and_return(true)
      end

      it "should be called" do
        expect(client).to receive(:has_admin_privileges?)
        client.do_windows_admin_check
      end

      context "admin privileges exist" do
        before do
          expect(client).to receive(:has_admin_privileges?).and_return(true)
        end

        it "should not log a warning message" do
          expect(logger).not_to receive(:warn)
          client.do_windows_admin_check
        end

        context "fatal admin check is configured" do
          it "should not raise an exception" do
            client.do_windows_admin_check #should not raise
          end
        end
      end

      context "admin privileges doesn't exist" do
        before do
          expect(client).to receive(:has_admin_privileges?).and_return(false)
        end

        it "should log a warning message" do
          expect(logger).to receive(:warn)
          client.do_windows_admin_check
        end

        context "fatal admin check is configured" do
          it "should raise an exception" do
            client.do_windows_admin_check # should not raise
          end
        end
      end
    end
  end

  describe "assert_cookbook_path_not_empty" do
    before do
      Chef::Config[:solo_legacy_mode] = true
      Chef::Config[:cookbook_path] = ["/path/to/invalid/cookbook_path"]
    end

    context "when any directory of cookbook_path contains no cookbook" do
      it "raises CookbookNotFound error" do
        expect do
          client.send(:assert_cookbook_path_not_empty, nil)
        end.to raise_error(Chef::Exceptions::CookbookNotFound, 'None of the cookbook paths set in Chef::Config[:cookbook_path], ["/path/to/invalid/cookbook_path"], contain any cookbooks')
      end
    end
  end

  describe "setting node name" do
    context "when machinename, hostname and fqdn are all set" do
      it "favors the fqdn" do
        expect(client.node_name).to eql(fqdn)
      end
    end

    context "when fqdn is missing" do
      # ohai 7 should always have machinename == return of hostname
      let(:fqdn) { nil }
      it "favors the machinename" do
        expect(client.node_name).to eql(machinename)
      end
    end

    context "when fqdn and machinename are missing" do
      # ohai 6 will not have machinename, return the short hostname
      let(:fqdn) { nil }
      let(:machinename) { nil }
      it "falls back to hostname" do
        expect(client.node_name).to eql(hostname)
      end
    end

    context "when they're all missing" do
      let(:machinename) { nil }
      let(:hostname) { nil }
      let(:fqdn) { nil }

      it "throws an exception" do
        expect { client.node_name }.to raise_error(Chef::Exceptions::CannotDetermineNodeName)
      end
    end
  end

  describe "always attempt to run handlers" do
    subject { client }
    before do
      # fail on the first thing in begin block
      allow_any_instance_of(Chef::RunLock).to receive(:save_pid).and_raise(NoMethodError)
    end

    context "when audit mode is enabled" do
      before do
        Chef::Config[:audit_mode] = :enabled
      end
      it "should run exception handlers on early fail" do
        expect(subject).to receive(:run_failed)
        expect { subject.run }.to raise_error(Chef::Exceptions::RunFailedWrappingError) do |error|
          expect(error.wrapped_errors.size).to eq 1
          expect(error.wrapped_errors).to include(NoMethodError)
        end
      end
    end

    context "when audit mode is disabled" do
      before do
        Chef::Config[:audit_mode] = :disabled
      end
      it "should run exception handlers on early fail" do
        expect(subject).to receive(:run_failed)
        expect { subject.run }.to raise_error(NoMethodError)
      end
    end
  end
end